package lab02.Test36;

/**
 * Created by ASUS on 2017/11/9.
 */
public class Postgraduate extends Student {
    @Override
    String calGrade() {
        double avg=calAverage();
        if(avg>=90 && avg<=100)
            grade = "优秀";
        else if(avg>=80 &&avg<90)
            grade = "良好";
        else if(avg>=70 &&avg<80)
            grade = "一般";
        else if(avg>=60 &&avg<70)
            grade = "及格";
        else
            grade = "不及格";
        return grade;
    }
}
